Add tab status to accessibility labels

chrome/browser/ui/views/tabs/tab_renderer_data.h

Index: chrome/browser/ui/views/tabs/tab_renderer_data.h
diff --git a/chrome/browser/ui/views/tabs/tab_renderer_data.h b/chrome/browser/ui/views/tabs/tab_renderer_data.h
index 829de7e559b9b2f8e44154e3c215ed6884297f0e..3a64f6fa96aff0b3f8b9ebb4927aee943f82c275 100644
--- a/chrome/browser/ui/views/tabs/tab_renderer_data.h
+++ b/chrome/browser/ui/views/tabs/tab_renderer_data.h
@@ -17,9 +17,10 @@ struct CHROME_VIEWS_EXPORT TabRendererData {
   // may be used to alter the UI (e.g. show different kinds of loading
   // animations).
   enum NetworkState {
-    NETWORK_STATE_NONE,     // no network activity.
-    NETWORK_STATE_WAITING,  // waiting for a connection.
-    NETWORK_STATE_LOADING,  // connected, transferring data.
+    NETWORK_STATE_NONE = 0,     // no network activity.
+    NETWORK_STATE_WAITING = 1,  // waiting for a connection.
+    NETWORK_STATE_LOADING = 2,  // connected, transferring data.
+    NETWORK_STATE_ERROR = 3,    // Encountered a network error.
   };
 
   TabRendererData();